Driving to the GeoCache

Part 1: Here I spend almost 90 minutes driving 25 miles trying to find the path that leads down to the cache site which is submerged near the banks of the river below. A freeway cuts off access from the north, and the river blocks access from the south, so I am looking for a path running east / west. Twice I glimpse the path to the east but can't tell where it leads until I finally park my car and walk over the bridge. Only then do I see I've been driving by the access road the entire time!